Title: In Situ Fully Light-Driven Switching of Superhydrophobic Adhesion

Author: Chao Li, Yuanyuan Zhang, Jie Ju, Futao Cheng, Mingjie Liu, Lei Jiang, Yanlei Yu*

Journal: Adv. Funct. Mater., 2012, 22(4), 760-763

Abstract:

An in situ fully light-driven switching of superhydrophobic adhesion is demonstrated based on simply spin-coating a hydrophobic azo-polymer on an optimized micro-nanopost arrayed silicon substrate. Furthermore, the detailed designing principles are discussed, which might shed light on efficient exploitation of superhydrophobic liquid/solid interfaces for smart microfluidic control.

论文链接：https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201101922

PDF下载：In Situ Fully Light-Driven Switching of Superhydrophobic Adhesion.pdf

通过在优化的微纳米桩阵列硅衬底上简单地旋涂疏水偶氮苯聚合物，实现了一种原位全光驱动的超疏水黏附开关。在紫外和可见光交替照射下，偶氮苯聚合物涂层呈现出顺反光异构化，导致液滴接触角发生可逆变化，进而控制其黏附作用。这种实时可控的微液滴黏附，对新型微流体器件如遥控阀、传感器、机械手、微反应器等的设计和应用具有启发和指导意义。此外，本工作揭示的设计原则将为后续具有超疏水黏附开关的智能固/液界面研究提供指导。